Humidifier Vs. Diffuser: What's The Difference?

Humidifiers and diffusers are often confused, as the products can look similar on the outside or have similar functions. But there are several important differences between these technologies. Check out the comparison below to see whether a humidifier, diffuser or both may best fit your needs.

Purpose:Humidifer Adds moisture to the air,Diffuser Adds fragrance to the room
Benefit:Humidifer Relieves dry air discomforts, like dry skin, scratchy throat and stuffy nose;Diffuser Provides aromatherapy, without increasing room humidity
Method:Humidifer Uses water to raise humidity level in room;Diffuser Uses water to disperse essential oil into air
Size :Humidifer Tank usually holds at least a half-gallon of water ;Diffuser Reservoir usually holds less than a cup of water

What type of solution do you need?
If you need more moisture in the air in your home, then you need a humidifier. If you only want to add fragrance to the air, and not moisture, then a diffuser is the proper product. Diffusers simply do not hold enough water to impact the humidity level of a room.

What is the benefit of more moisture?
Having the right humidity level in your home can help you breathe easier, temporarily relieving coughs and congestion. Moisture in the air can also help temporarily relieve dry skin, dry eyes and chapped lips. Proper humidity has important benefits for your whole house as well, including helping to prevent gaps in hardwood floors, cracks in wooden furniture and static electricity that can harm electronics.

What if you want moisture and fragrance?
If you want it all, you’re in luck. Today’s humidifier technologies can often include aromatherapy capabilities. Honeywell offers warm mist and ultrasonic cool mist humidifiers that let you add essential oils to a compartment of the humidifier, delivering therapeutic fragrance as well as soothing moisture.

Designer Series Cool Mist Humidifier: A sleek, cool mist humidifier with an essential oil tray to disperse fragrance.
Soothing Comfort Warm Mist Humidifier: A comforting warm mist humidifier with a cup for essential oils or medicinal liquid inhalants.
Keep in mind, a standard humidifier cannot be “turned into” a diffuser by adding essential oils to the water in the tank. Doing this can damage your humidifier. Instead, use a separate diffuser for your aromatherapy needs, or choose a humidifier designed with an aromatherapy function.

Explore all your options for humidifiers, and start living more comfortably!
Humidifier vs Diffuser: What is the difference between the two?
Humidifier and diffuser are quite similar in their way of working. But there are some differences which people need to know before buying them. So, here’s the difference between the diffuser and humidifier.

Humidifier and diffuser can both be used to bring a therapeutic effect in your home. We can use essential oils for them to make the rooms smell pleasant. But what is the difference between a diffuser and a humidifier?

People often don’t understand this and get confused with the two. As a result, they don’t know what to buy exactly to fulfil their purpose. So, here we give you a complete guide about the difference between humidifier and diffuser. Let’s find out.

What is the difference between diffuser and humidifier?


The main purpose of a diffuser is to freshen up the aroma of a room. Most people prefer this a lot to make their rooms refreshing. Essential oils are used in the diffuser to make the space smell nice. There are different types of diffusers like ultrasonic, nebulising, heat and evaporative.

Pros of diffuser?

These are the pros of a diffuser:

1.Diffusers are only used with essential oils.

2.The mist of the oils get absorbed in the skin making it relaxed and soothing.

3.The oils also reduce bacteria and fungus in the room.

4.It also prevents many health issues if you use the right kind of oil.


The main purpose of a humidifier is to increase the humidity level in a room. This is perfect for those who live in a dry climate and is good to use in winter season as well. It maintains the moisture level in the air. This is highly beneficial for adults and kids having nasal congestion. Types of humidifier are warm mist, ultrasonic, impeller and evaporative.

Pros of humidifier are as follows:

1.It’s helpful for dry weather.
2.This can resolve many problems like dry skin, nosebleeding, snoring, etc.

3.It can also be used to treat the symptoms of cold, flu, sinus congestion, etc.
Similarities between humidifier and diffuser:

1.A humidifier can be used as a diffuser if you put your favourite essential oil in it and it can be done in ultrasonic humidifiers. So, ultrasonic diffuser and humidifier are the almost similar.
2.Diffusers can also be turned into a humidifier and for that, you need nebulising diffusers. They turn the essential oils into tiny droplets and disperse them directly into the air.

How to choose between diffuser and humidifier?

1.If you want both therapeutic effects and humidity in your room, then ultrasonic diffusers are best for you. You can omit essential oils while turning it on if you need only humidity. But this is not possible in other humidifiers.
2.Diffusers are generally smaller than humidifiers. And humidifiers come in different shapes and sizes. So, if you have a smaller space, then it’s better to opt for diffuser humidifier or ultrasonic humidifier. This will save your space.

Types of diffusers:

1.In evaporative diffusers, you need to put drops of oils in the filter or pad of the diffuser. Then, its fan will blow air through the filter to evaporate the oil.
2.Heat diffusers are the same with only one difference. It uses heat instead of a fan to evaporate the oil.
3.Nebuliser diffuser is considered to be the most effective one. There is a tube in it where the oil has to be poured. Then an air-jet blows across the top of the tube along with a vacuum effect to evaporate the oil.
4.Ultrasonic diffusers can be used both as a diffuser or a humidifier.

Types of humidifier:

1.Warm mist humidifier boils water to produce the steam and then release it into the air.
2.Evaporative humidifier expels cool mist. When water is added to it, it’s soaked by a wick, filter or belt and then a fan blows air through it.
3.Cool mist humidifier breaks the water into tiny droplets by a spinning disk and then disperses them into the room.
4.Ultrasonic humidifiers can also be used as diffusers.